Get a car seat that lasts. The Cosco Highback Booster Car Seat takes your child through two different stages. It starts as a LATCH equipped, forward-facing harnessed car seat with a five-point harness that easily adjusts from the front. When your child is ready, remove the harness and the seat can be used in belt-positioning mode up to 80 pounds. In both modes, it features a removable cup holder that's there when you need it and easy to toss in the trunk when you don't.